package filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/*")
public class CharacterFilter implements Filter {

    public void init(FilterConfig config) throws ServletException {
        System.out.println("全局过滤器被初始化了");
    }
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
            throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        String method = request.getMethod();
        if("POST".equals(method)){
            request.setCharacterEncoding("utf-8");

        }
        response.setContentType("text/html;charset=utf-8") ;
        chain.doFilter(req, resp);
    }

    public void destroy() {
        System.out.println("过滤器被销毁了");
    }


}
